1. Bradley Department of Electrical and Computer Engineering Virginia Polytechnic Institute and State University Blacksburg VA USA
2. National Institute of Aerospace Hampton VA USA
3. Space Science Institute Boulder CO USA
4. Goddard Planetary Heliophysics Institute University of Maryland, Baltimore County Baltimore MD USA
5. Geospace Physics Laboratory NASA Goddard Space Flight Center Greenbelt MD USA
6. DTU Space Technical University of Denmark Kongens Lyngby Denmark